Imani, D., R. Rezaei, D. Jafari, B. Razi, S. Alizadeh, M. Bashashati, and N. Rezaei. “IL-6 174 G/C Polymorphism in Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis”. Acta Medica Iranica, Vol. 56, no. 12, Jan. 2019, pp. 740-9, http://acta.tums.ac.ir/index.php/acta/article/view/7340.